My office Wage says just 25 kg. So let's just stairs up or down requires a lot of breath. The mobility contradicts continue the exhaust hose. As mobile as this would make the product-oriented description, the device is so long not. The volume is in a corner office at best bearable, at night in the bedroom, however, getting used to. It's just a loud fan noise in the can one sleep and the other possibly not. The fan can be adjusted in 2 steps from loud to very loud. ;) The supplied exhaust hose has about 1.5 meters in length and 120 mm in diameter at the output. Cold makes the device and meets the effect his purpose. When given 495 kw / h is looking forward your current supplier. Addendum: The device has a large air flow even at low fan speed. This means that you have to make in a large living room not only for the deliverance of the exhaust hose but also for a possibility of air supply itself. Clean place in a vacuum chamber and the air conditioning is accordingly ineffective. Furthermore, the adjustable blades are to control the direction of the cooling air completely pointless, as they are automatically pushed through the Virbrationen the device and the airflow within a few seconds in center position.